.page-about {
  --about-gap: clamp(48px, 7vw, 84px);
  --about-note: rgba(234, 244, 239, 0.78);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .wrap {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: 20px;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.page-about .section-head h2 {
  font-size: clamp(22px, 4.8vw, 34px);
  margin: 8px 0 12px;
}

.page-about .section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: 20px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 84% at 88% -12%, rgba(43, 245, 200, 0.16), transparent 62%),
    repeating-linear-gradient(118deg, rgba(234, 244, 239, 0.032) 0 1px, transparent 1px 9px),
    var(--ink);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 26px;
  padding-bottom: 30px;
}

.page-about .hero-figure {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 6px 14px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
}

.page-about .round-label {
  width: 100%;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .hero-round {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(56px, 17vw, 148px);
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-round-note {
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-about .hero-copy h1 {
  font-size: clamp(27px, 7vw, 46px);
  margin: 10px 0 16px;
}

.page-about .hero-copy .lede {
  margin: 0;
  max-width: 56ch;
  color: var(--about-note);
  font-size: 16px;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .hero-status {
  border-top: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .hero-status ul {
  list-style: none;
  margin: 0;
  padding: 12px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .hero-status li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .hero-status .num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

/* ---------- 起源 ---------- */
.page-about .origin {
  padding: 12px 0 0;
  background: var(--ink);
}

.page-about .origin-band {
  background: linear-gradient(155deg, #7e1f3d 0%, #4a1126 100%);
  padding: 34px 22px 62px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
}

.page-about .origin-band .kicker {
  color: var(--amber);
}

.page-about .origin-band h2 {
  font-size: clamp(22px, 5vw, 34px);
  margin: 8px 0 20px;
  max-width: 22ch;
}

.page-about .origin-body {
  display: grid;
  gap: 14px;
  max-width: 70ch;
}

.page-about .origin-body p {
  margin: 0;
  color: var(--about-note);
  font-size: 15px;
}

/* ---------- 发展阶段 ---------- */
.page-about .stages {
  padding: var(--about-gap) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .stages-layout {
  display: grid;
  gap: 26px;
}

.page-about .stages-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .stages-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.08) brightness(0.86);
}

.page-about .stages-media figcaption,
.page-about .team-media figcaption,
.page-about .coverage-band figcaption {
  padding: 10px 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .stage {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 20px;
}

.page-about .stage-scale {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 4px;
}

.page-about .stage-year {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .stage-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}

.page-about .stage-scale::after {
  content: "";
  width: 1px;
  flex: 1 1 auto;
  min-height: 18px;
  background: linear-gradient(var(--line), transparent);
}

.page-about .stage-card {
  position: relative;
  padding: 16px 16px 18px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: 2px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .stage-card:hover,
.page-about .stage-card:focus-within {
  background: var(--ink-3);
  border-color: var(--line);
  border-top-color: var(--cyan);
}

.page-about .stage-no {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-about .stage-card h3 {
  font-size: 17px;
  margin: 6px 0 8px;
}

.page-about .stage-card p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team {
  padding: var(--about-gap) 0;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.page-about .team-layout {
  display: grid;
  gap: 26px;
}

.page-about .team-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-3);
}

.page-about .team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.1) brightness(0.8);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: end;
}

.page-about .team-item {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.page-about .team-stem {
  display: block;
  padding: 6px 0 0 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  border-radius: 2px 2px 0 0;
}

.page-about .team-item--edit .team-stem {
  height: 132px;
  background: linear-gradient(180deg, rgba(43, 245, 200, 0.35), var(--cyan));
}

.page-about .team-item--proof .team-stem {
  height: 74px;
  background: linear-gradient(180deg, rgba(242, 193, 78, 0.35), var(--amber));
}

.page-about .team-item--tech .team-stem {
  height: 52px;
  background: linear-gradient(180deg, rgba(147, 179, 169, 0.35), var(--muted));
}

.page-about .team-item h3 {
  font-size: 14px;
  margin: 12px 0 6px;
}

.page-about .team-item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .flow {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .flow li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 12px 14px;
  background: var(--ink);
}

.page-about .flow-no {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  align-self: center;
}

.page-about .flow strong {
  font-size: 14px;
  letter-spacing: 0.02em;
}

.page-about .flow span:last-child {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- 期号体系 ---------- */
.page-about .rounds {
  padding: var(--about-gap) 0;
  border-bottom: 1px solid var(--line);
  background:
    repeating-linear-gradient(118deg, rgba(234, 244, 239, 0.025) 0 1px, transparent 1px 11px),
    var(--ink);
}

.page-about .round-hub {
  display: grid;
  gap: 18px;
}

.page-about .round-core {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  border: 1px solid var(--cyan);
  border-radius: 2px;
  background: rgba(43, 245, 200, 0.06);
}

.page-about .round-core strong {
  font-family: var(--font-mono);
  font-size: 46px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .round-core-note {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
}

.page-about .round-out {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .round-out li {
  padding: 13px 16px;
  border-left: 2px solid var(--line);
  background: var(--ink-2);
}

.page-about .round-out li.is-key {
  border-left-color: var(--cyan);
}

.page-about .round-out h3 {
  font-size: 15px;
  margin: 0 0 4px;
}

.page-about .round-out p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 合作与覆盖 ---------- */
.page-about .coverage {
  padding: var(--about-gap) 0;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.page-about .coverage-band {
  margin: 0 0 26px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .coverage-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.75) contrast(1.12) brightness(0.72);
}

.page-about .coverage-figures {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}

.page-about .figure-item {
  padding: 16px 14px;
  background: var(--ink);
}

.page-about .figure-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--amber);
  line-height: 1.1;
}

.page-about .figure-item p {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 原则 ---------- */
.page-about .principles {
  padding: var(--about-gap) 0;
}

.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .principle-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .principle-no {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--wine);
  line-height: 1;
}

.page-about .principle-body h3 {
  font-size: 17px;
  margin: 0 0 6px;
}

.page-about .principle-body p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: 0 0 var(--about-gap);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 22px;
  padding: 28px 22px;
  background: linear-gradient(135deg, var(--wine) 0%, #3c0d1e 100%);
  border-radius: 2px;
}

.page-about .about-cta-inner .kicker {
  color: var(--amber);
}

.page-about .about-cta-inner h2 {
  font-size: clamp(20px, 4.4vw, 30px);
  margin: 8px 0 10px;
}

.page-about .about-cta-inner p {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  color: var(--about-note);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .coverage-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 48px;
    align-items: end;
    padding-bottom: 44px;
  }

  .page-about .hero-copy h1 {
    margin-top: 12px;
  }

  .page-about .origin-band {
    padding: 46px 48px 76px;
  }

  .page-about .stages-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .stages-media {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .stage {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 20px;
    padding-bottom: 26px;
  }

  .page-about .stage-year {
    font-size: 14px;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 34px;
  }

  .page-about .round-hub {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .round-core strong {
    font-size: 56px;
  }

  .page-about .coverage-figures {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .principle-list {
    gap: 26px;
  }

  .page-about .principle-list li {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .principle-no {
    font-size: 28px;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
    gap: 32px;
    padding: 40px 44px;
  }

  .page-about .about-cta-links {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stage-card,
  .page-about .team-stem {
    transition: none;
  }
}
<<<END>>>